Manufacture of structural material.



UNITED STATES PATENT OFFICE.

CHARLES E. DUNCAN, 0F SAULT STE. MARIE, ONTARIO, CANADA, AND J'OSEIH FAWELL, 0F PITTSBURGH, PENNSYLVANIA.

MANUFACTURE OF STRUCTURAL MATERIAL.

Specification of Letters Patent.

Application filed March 9, 1911.

Patented War. 26, 1912.

Serial No. 613,347.

To all whom it may concern Be it known that we, CHARLES E. DUN- CAN, residing at Sault Ste. Marie, 1n the Province of Ontario, Dominion of Canada, and J osnrrr FAWELL, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, citizens of the United States, have invented 0r discovered certain new and useful Improvements in the Manufacture of Structural Material, of which improvements the following is a specification.

It is the practice in rolling structural materials such as beams, channels, etc., in universal mills, to so shape the portions of the rolls forming the edges of the flanges, that the surfaces form a sharp angle at the outer corners of the flanges and by reason of the large radiating surfaces, the small ridges of metal forming such corners are quickly chilled and as the portions of the rolls which shape these corners, move at a slower speed than the metal they operate on, the chilled strips or ridges, having lost their plasticity, are torn and broken.

The invention described herein has for its object the forcing of these chilled strips or ridges back into the adjacent and hotter metal and then in a subsequent pass reforming the edges of the flanges.

The invention is hereinafter more fully described and claimed.

In the accompanying drawing forming a part of this specification Figure 1 is an elevation of a stand of rolls adapted to effect a reformation of the flanges; Fig. 2 is an elevation of a pair of two-high rolls having the surfaces operative on the metal, shaped to force the chilled strips or ridges back into the hotter adjacent metal; Fig. 3 is an elevation of a stand of universal rolls adapted to effect the rolling-in of the chilled strips; Fig. 4 is sectional view on an enlarged scale of portions of the rolls shown in Fig. 2; Fig. 5 is a similar view of the rolls shown in Fig. 3; Figs. 6 and 7 are transverse sections of beam blanks prior to their being operated on by the rolls shown in Figs. 4 and 5 respectively.

While our improved method can be applied at any stage in the reduction of a blank to the finished article, it will as a general thing, be necessary only toward the end of the shaping operation, say about the sixth or seventh pass, or a pass especially provided before or after the seventh pass,

as hereinafter described, for effecting the rolling-in of the chilled ridge or strip.

In Figs. 2 and 4 is shown a pair of horizontal rolls 1 having the faces a, b and 0 so proportioned that when the rolls are adjusted to proper relation to each other, these faces will not affect any substantial or material reduction, the function of said portions being to support the metal, while the portions (Z of the rolls operate on the chilled corners e of the flanges 2 of the beam 3 shown in Fig. 6. In passing through between these rolls these corners c are forced back into the adjacent hotter metal, and will absorb sutficient heat to be sufliciently plastic for the finishing passes. These rolls 1 may as stated be interposed between any desired passes in a train or series of universal rolls, but will be more beneficial between the last two passes, at which time there has been a very considerable reduction of temperature. After the corners have been rolled-in, as stated, the blank is fed in the usual manner through an adjacent stand of rolls having their operative faces so constructed that the desired sharp square corners are formed on the flanges, as shown in Fig. 1.

In lieu of employing an extra stand of rolls for forcing in the chilled corners, the rolls of one of the stands of the train or series of universal rolls, may be constructed to effect the rolling-in of the corners as shown in Figs. 3 and 5. The vertical rolls 4 are spaced a distance apart substantially equal to the depth desired in the finished article, but as will be seen by comparison with Fig. 1, the vertical rolls are made shorter than in the other stands in order to permit the access of a reducing face on the horizontal rolls 5 to the corners of the flanges. These corner-reducing faces are formed by the inner surfaces of collars 6 on the horizontal rolls, and, as clearly shown in Fig. 5, the portions of these inner faces of the collars in contact at any given instant with the metal are at an acute angle with the portions of the faces of the vertical rolls in contact with the metal at the same instant.

As in the construction shown in Figs. 2 and 4 the outer faces of the flanges are unsupported and not operated on, it will be readily understood that no other portions of the article except the corners of the flanges, should be subjected to reducing action. But in the construction shoWn in Figs. 3 and 5 it is preferred that the collars 7 of the horizontal rolls should be proportioned relative to the preceding pass in which the blank shown in Fig. 7 was formed, to efl'ect the usual reduction as described in application Serial No. 608458, filed February 13, 1911.

As before stated any one of the stands of rolls of the series or train may have their rolls constructed to roll-in the chilled corners, but as a general rule such rolling-in Will be effected in next to the last pass and the forcing of the corners to final shape will be done in the last pass as before stated.

WVe claim herein as our invention:

1. The method herein described of manufacturing structural material as beams, etc., which consists in forcing chilled portions of the article back into hotter metal, and then in a subsequent pass restoring the shape of the part deformed in rolling-in.

2. The method herein described of manufacturing structural material, such as beams, etc, which'consists in effecting a transverse reduction of the article, forcing chilled portions of the article into hotter metal during such reduction, and in a subsequent pass restoring the shape of the part deformed in rolling-in.

3. In a universal mill for manufacturing structural material such as beams, etc., the combination of vertical rolls, and horizontal rolls having collars adapted to effect transverse reduction of the article and provided With collars adapted to roll-in the chilled corners of the flange portions of the article.

4:. In a universal mill for rolling structural material such as beams, etc., the combination of vertical rolls and horizontal rolls adapted to effect a transverse reduction of the article, the horizontal rolls being provided With collars having operative faces Which When in contact With the metal Will be at acute angles to the portions of the faces of the vertical rolls also in contact With the metal.

In testimony Whereof, We have hereunt set our hands.

CHARLES E. DUNCAN. JOSEPH FAWELL. Witnesses:

OSCAR BRASHEAR, THOMAS J OYCE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

